ADNS-5060 Avago Technologies US Inc., ADNS-5060 Datasheet - Page 26

• Manufacturer Part Number: ADNS-5060
• Description: IC USB OPT MOUSE SENSOR HS 8-DIP
• Manufacturer: Avago Technologies US Inc.

Specifications of ADNS-5060

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

SQUAL1
Access: Read
Data Type: Upper 8 bits of a 9-bit integer.
USAGE: SQUAL (Surface QUALity) is a measure of the number of features visible by the sensor in the current frame.
Figure 29. Typical mean SQUAL vs. z (white paper)
26
Bit
Field
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
0
1
1.6
The maximum value is 128. Since small changes in the current frame can result in changes in SQUAL, variations
in SQUAL are expected, when looking at a surface. The graph below shows 250 sequentially acquired SQUAL
values, while a sensor was moved slowly over white paper. SQUAL is nearly equal to zero when there is no
surface below the sensor.
50
99 148 197 246 295 344 393 442 491 540 589 638 687 736 785
7
SQ
1.8
Distance from Lens Reference Plane to Tracking Surface, Z (mm)
7
2.0
6
SQ
2.2
6
2.4
Count
Address: 0x04
Reset Value: 0x00
5
SQ
5
2.6
2.8
4
SQ
4
3.0
3.2
3
SQ
3
3.4
2
SQ
2
Avg-3sigma
Avg
Avg+3sigma
1
SQ
1
0
SQ
0